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average frame time

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This commit is contained in:
Carter Anderson 2019-12-07 23:48:25 -08:00
parent 42fd25cfd9
commit 5c1ce0597f
1 changed files with 16 additions and 1 deletions
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17
examples/simple.rs
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@ -1,6 +1,7 @@
use bevy::*;
use bevy::{render::*, asset::{Asset, AssetStorage, Handle}, math::{Mat4, Quat, Vec3}, Schedulable, Parent};
use rand::{rngs::StdRng, Rng, SeedableRng, random};
use std::collections::VecDeque;
fn build_wander_system() -> Box<dyn Schedulable> {
let mut rng = StdRng::from_entropy();
@ -73,6 +74,10 @@ fn build_move_system() -> Box<dyn Schedulable> {
fn build_print_status_system() -> Box<dyn Schedulable> {
let mut elapsed = 0.0;
let mut frame_time_total = 0.0;
let mut frame_time_count = 0;
let mut frame_time_max = 10;
let mut frame_time_values = VecDeque::new();
SystemBuilder::new("PrintStatus")
.read_resource::<Time>()
.with_query(<(
@ -80,8 +85,18 @@ fn build_print_status_system() -> Box<dyn Schedulable> {
)>::query())
.build(move |_, world, time , person_query| {
elapsed += time.delta_seconds;
frame_time_values.push_front(time.delta_seconds);
frame_time_total += time.delta_seconds;
frame_time_count += 1;
if frame_time_count > frame_time_max {
frame_time_count = frame_time_max;
frame_time_total -= frame_time_values.pop_back().unwrap();
}
if elapsed > 1.0 {
println!("fps: {}", if time.delta_seconds == 0.0 { 0.0 } else { 1.0 / time.delta_seconds });
// println!("fps: {}", if time.delta_seconds == 0.0 { 0.0 } else { 1.0 / time.delta_seconds });
if frame_time_count > 0 && frame_time_total > 0.0 {
println!("fps: {}", 1.0 / (frame_time_total / frame_time_count as f32))
}
println!("peeps: {}", person_query.iter(world).count());
elapsed = 0.0;
}